Rocker Chris Cornell, who gained fame as the lead singer of the bands Soundgarden and later Audioslave, has died at age 52, according to his representative.

Cornell, who had been on tour, died Wednesday night in Detroit, Brian Bumbery said in a statement to The Associated Press.

Bumbery called the death “sudden and unexpected” and said his wife and family were shocked by it. The statement said the family would be working closely with the medical examiner to determine the cause and asked for privacy.

As the lead singer for Seattle-based Soundgarden, Cornell helped architect the 90’s grunge rock movement. He was also a Grammy award-winning, Golden Globe nominated singer, songwriter, guitarist, composer and lyricist.